Systemd changes | root script | URL support for gif effects (#1319)

* Systemd changes and URL option for Gif Effects
* Add grayscale to gif effect
* WebUI adjustments
* Rename version to .version
* Copy runHyperionAsRoot.sh to rpi packages
* Pack script into all unix packages
* Start hyperion only after network is available
* Snap builds removed due to poor server connection
* Flexible updateHyperionUser.sh
* updateHyperionUser script entered in the package
* Print help on none sudo execute
* Corrected embedded Python location
* Replacement for the QWindowsScreen grabWindow function
* Updated to latest 2.x mbedtls version 2.27

Co-authored-by: LordGrey <lordgrey.emmel@gmail.com>

effects/matrix.json

@@ -0,0 +1,16 @@
+{
+	"name" : "Matrix",
+	"script" : "gif.py",
+	"args" :
+	{
+		"cropBottom": 0,
+		"cropLeft": 0,
+		"cropRight": 0,
+		"cropTop": 0,
+		"fps": 30,
+		"grayscale": false,
+		"imageSource": "url",
+		"reverse": false,
+		"url": "https://i.gifer.com/1j6F.gif"
+	}
+}